bpo-33123: pathlib: Add missing_ok parameter to Path.unlink (GH-6191)

Similarly to how several pathlib file creation functions have an "exists_ok" parameter, we should introduce "missing_ok" that makes removal functions not raise an exception when a file or directory is already absent.  IMHO, this should cover Path.unlink and Path.rmdir.  Note, Path.resolve() has a "strict" parameter since 3.6 that does the same thing. Naming this of this new parameter tries to be consistent with the "exists_ok" parameter as that is more explicit about what it does (as opposed to "strict").


https://bugs.python.org/issue33123

1 files changed, 6 insertions, 2 deletions

diff --git a/Lib/pathlib.py b/Lib/pathlib.py
index 952cd94..b5bab1f 100644
--- a/Lib/pathlib.py
+++ b/Lib/pathlib.py
@@ -1279,14 +1279,18 @@ class Path(PurePath):
             self._raise_closed()
         self._accessor.lchmod(self, mode)
 
-    def unlink(self):
+    def unlink(self, missing_ok=False):
         """
         Remove this file or link.
         If the path is a directory, use rmdir() instead.
         """
         if self._closed:
             self._raise_closed()
-        self._accessor.unlink(self)
+        try:
+            self._accessor.unlink(self)
+        except FileNotFoundError:
+            if not missing_ok:
+                raise
 
     def rmdir(self):
         """